Question

What happens when (a) light travels from rarer to a denser medium (b) light travels from denser to rarer medium. Explain both cases with diagram.

Answer 1

Case 1: When light rays travel from optically rarer medium to denser medium then they bend towards normal. In this case angle of refraction is smaller than angel of incidence. When light rays travel from air into glass or from air into water, it bends towards normal.

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